I have helped many students score in A Maths since 1984. More than 80% have achieved A1/A2 in both E & A Maths. Several of them have gone on to earn 1st Class Honours degrees. Many of them are now successful professionals. This is my blog of how to be successful at A Maths. I will talk about one question every day. Drop me a line if you have a question!
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Monday, October 25, 2010
Show that a quadratic function is always positive or negative
Can I complete the square to show that a particular quadratic expression is always negative or positive? Or MUST I only use discriminant to show that it is always negative or positive.
Can I complete the square to show that a particular quadratic expression is always negative or positive? Or MUST I only use discriminant to show that it is always negative or positive.
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